| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior Related to Interface Physics IV
|
| Presentation Title |
The enigma of solute effect on strength of metal alloys at the nanoscale |
| Author(s) |
Zhao Liang, Feitao Li, Eugen Rabkin |
| On-Site Speaker (Planned) |
Eugen Rabkin |
| Abstract Scope |
It is now well established that the compressive strength of metal nanoparticles fabricated using the solid-state dewetting method is comparable to the theoretical strength of the respective metal. Studies on metal alloy nanoparticles indicate that alloying metal nanoparticles with a second component leads to softening. This softening trend has been observed in single-crystalline faceted Ni-Fe, Ni-Co, and Cu-Au nanoparticles and has been discussed in terms of local atomic-level stress fluctuations caused by misfitting solute atoms. Conversely, the strength of rounded Ag-Au nanoparticles was shown to be nearly independent of composition. In this work, we performed in-situ microcompression testing of rounded nanoparticles of Ag-Pd alloy, characterized by a relatively large atomic size misfit between the two elements. The modulus-normalized strength was independent of composition. We discuss these findings in terms of the size effect on strength and the interaction of solute atoms with defects. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Nanotechnology, Thin Films and Interfaces |